code: def name(self):
      return "SliceDataGrad"
  
file_path: nnabla/python/src/nnabla/backward_function/slice.py
imports: import nnabla
  import nnabla.function
  import nnabla.functions
  from .backward_function import UnaryDataGrad
label_desc: Use image node_id 1 for calling the SliceDataGrad obj's underlying member method code with example usage: obj.name() and returns: str